A subclass ivar is apparently overwriting a super class ivar.
When an instance of MGS_B sets stderrData the super class ivar tempFilePath
gets overwritten.
Moving tempFilePath up the ivar list resolves the problem (though doubtless
creates another).
Moving ivar stderrData into the superclass
I'm trying to populate an OutlineView. I've had success in the past but
now, apparently, I'm unable to do it!
Looking at this code:
- (id)outlineView:(NSOutlineView *)outlineView child:(int)index
ofItem:(id)item
{
if (item == nil)
{
[mailListDict writeToFile:@/test.plist
Le 26 mai 2010 à 13:40, jonat...@mugginsoft.com a écrit :
A subclass ivar is apparently overwriting a super class ivar.
When an instance of MGS_B sets stderrData the super class ivar tempFilePath
gets overwritten.
If I am not mistaken, if your superclass ivar is private (!= protected), it
On 26/05/2010, at 10:13 PM, vincent habchi wrote:
If I am not mistaken, if your superclass ivar is private (!= protected), it
cannot be accessed from its subclasses. Thus, the compiler can choose to
reuse part of the heap dedicated to private variables to implement subclasses
own private
Hello all.
Another question still regarding with pdf's.
when I load a pdf into a web view, I can tap for a while and the magnification
loop will appear, this doesn't happens when using Quartz..
I was reading some post on internet, and the authors create their own
magnification view. Is there
On 26/05/2010, at 10:12 PM, Pascal Harris wrote:
- (id)outlineView:(NSOutlineView *)outlineView
objectValueForTableColumn:(NSTableColumn *)tableColumn byItem:(id)item
{
if ([[[tableColumn headerCell] stringValue] compare:@Key] ==
NSOrderedSame)
{
I'm not sure what the problem is,
On Wed, May 26, 2010 at 8:13 AM, vincent habchi vi...@macports.org wrote:
Le 26 mai 2010 à 13:40, jonat...@mugginsoft.com a écrit :
A subclass ivar is apparently overwriting a super class ivar.
When an instance of MGS_B sets stderrData the super class ivar tempFilePath
gets overwritten.
If
Oh sorry, I should have read before posting the question again, I see somebody
its talking abour PDFSelection, and I say an example in the developer site.
So for the selection I will check that.
Now I have only the question about the loupe :S
thanks for any help
G.
On 26.5.2010, at
Le 26 mai 2010 à 14:22, Graham Cox a écrit :
I'm pretty sure you are mistaken. If this were even remotely true, object
programming would be impossible.
@private only declares the visibility of an ivar to its subclasses, it does
not give the compiler carte blanche to write over anything it
There's nothing wrong with the ivar declarations - something must be
going wrong at run time. Typically, when an object pointer seems to
point to the wrong object, the prime suspect is memory management. But
it's hard to say for sure, without seeing the relevant code.
The ivar decs look
On 26/05/2010, at 10:41 PM, vincent habchi wrote:
Hmmm... Let's say you have a class A with a private variable priv and b a
pointer to a subclass of A. Is:
[(A *)b priv]
legal?
No. It's not legal syntax for accessing an ivar in any case - square brackets
invoke a method:- [instance
Hi Jonathan
A subclass ivar is apparently overwriting a super class ivar.
When an instance of MGS_B sets stderrData the super class ivar tempFilePath
gets overwritten.
I'm not sure what you mean here by overwrite.
@interface Base : NSObject
{
@private
int i;
}
@end
@interface Sub :
On May 26, 2010, at 1:40 PM, jonat...@mugginsoft.com wrote:
A subclass ivar is apparently overwriting a super class ivar.
When an instance of MGS_B sets stderrData the super class ivar tempFilePath
gets overwritten.
Are you using this class across module boundaries? E.g. is the base class in
@interface A(MyCategory)
-(void)someMethodWhichLegallyAccessesThePrivateVariablePriv;
@end
That's legal, I can write a category against an already-compiled class without
having the source and without recompiling it and I can access any of the
private variables of that class. So no the
Le 26 mai 2010 à 14:53, Graham Cox a écrit :
On 26/05/2010, at 10:41 PM, vincent habchi wrote:
Hmmm... Let's say you have a class A with a private variable priv and b a
pointer to a subclass of A. Is:
[(A *)b priv]
legal?
No. It's not legal syntax for accessing an ivar in any
Le 26 mai 2010 à 14:53, Graham Cox a écrit :
On 26/05/2010, at 10:41 PM, vincent habchi wrote:
Hmmm... Let's say you have a class A with a private variable priv and b a
pointer to a subclass of A. Is:
[(A *)b priv]
legal?
No. It's not legal syntax for accessing an ivar in any
Le 26 mai 2010 à 15:00, Roland King a écrit :
@interface A(MyCategory)
-(void)someMethodWhichLegallyAccessesThePrivateVariablePriv;
@end
That's legal, I can write a category against an already-compiled class
without having the source and without recompiling it and I can access any of
Le 26 mai 2010 à 15:10, vincent habchi a écrit :
Le 26 mai 2010 à 14:53, Graham Cox a écrit :
On 26/05/2010, at 10:41 PM, vincent habchi wrote:
Hmmm... Let's say you have a class A with a private variable priv and b a
pointer to a subclass of A. Is:
[(A *)b priv]
legal?
No.
On 26/05/2010, at 11:10 PM, vincent habchi wrote:
So, tell me if I'm wrong, but I infer from your answer that whatever I can
do, there is no means for a subclass A' to access any private variable of its
ancestor.
Correct, if class A has not declared an accessor to it, and you haven't added
Le 26 mai 2010 à 15:24, Jean-Daniel Dupas a écrit :
Who knows what a class does when you set an ivar using the accessor. It would
badly break encapsulation principle.
For example, what would append if a NSView subclass change the view frame by
accessing the _frame ivar directly ?
You are
I have a property 'categories' of an object that returns a list (an array) of
objects, which in turn have a property 'name'.
Can I set up a NSPredicate that can match a string against any name in this
list? How?
In IB I set the left hand side to 'categories.name' but I get the error that
On May 26, 2010, at 6:00 AM, Roland King r...@rols.org wrote:
@interface A(MyCategory)
-(void)someMethodWhichLegallyAccessesThePrivateVariablePriv;
@end
That's legal, I can write a category against an already-compiled
class without having the source and without recompiling it and I can
On May 26, 2010, at 7:39 AM, Graham Cox wrote:
I have a property 'categories' of an object that returns a list (an array) of
objects, which in turn have a property 'name'.
Can I set up a NSPredicate that can match a string against any name in this
list? How?
In IB I set the left hand
On 27/05/2010, at 12:35 AM, Keary Suska wrote:
Not enough info: are you using Core Data, or a simple modeled relationship? I
assume the issue is about traversing a relationship--otherwise the solution
is trivial...
No, it's a simple 'to many' property in my own model, not using Core Data.
On May 26, 2010, at 12:29 AM, Scott Anguish wrote:
Another solution for conversion is using -CGImage on NSBitmapImageRep.
Yeah, IIRC, the problem with that strategy is that it requires a lot of mucking
around with color representations...
Brian Postow
Senior Software Engineer
Acordex
On May 26, 2010, at 8:42 AM, Graham Cox wrote:
On 27/05/2010, at 12:35 AM, Keary Suska wrote:
Not enough info: are you using Core Data, or a simple modeled relationship?
I assume the issue is about traversing a relationship--otherwise the
solution is trivial...
No, it's a simple
On 26 May 2010, at 13:55, Uli Kusterer wrote:
On May 26, 2010, at 1:40 PM, jonat...@mugginsoft.com wrote:
A subclass ivar is apparently overwriting a super class ivar.
When an instance of MGS_B sets stderrData the super class ivar tempFilePath
gets overwritten.
Are you using this class
Thanks for this - I've done as you suggested and it works fine. Serves me
right for attempting to learn from examples on the web ;)
On Wed, May 26, 2010 at 1:27 PM, Graham Cox graham@bigpond.com wrote:
On 26/05/2010, at 10:12 PM, Pascal Harris wrote:
- (id)outlineView:(NSOutlineView
On May 25, 2010, at 10:50 PM, Scott Andrew wrote:
So i have an app that I want to use the curl up UIView animation transition
in. however when the iPad his held in either the upside down portrait or
upside down landscape (button on right) the transitions are backwards. All
controls on the
On Wed, 26 May 2010 08:28:17 -0400, Sherm Pendley said:
Typically, when an object pointer seems to
point to the wrong object, the prime suspect is memory management.
Agreed. Jonathan, have you tried guard malloc and AUTO_USE_GUARDS?
--
On Wed, 26 May 2010 13:54:17 +0100, Joanna Carter said:
A subclass ivar is apparently overwriting a super class ivar.
When an instance of MGS_B sets stderrData the super class ivar
tempFilePath gets overwritten.
I'm not sure what you mean here by overwrite.
@interface Base : NSObject
{
Hello,
I have a transparent NSTableView embedded in a scroll view that doesn't draw
its background which displays a bunch of NSTextFieldCell columns. Everything is
fine, the container view's background is visible through the table.
Until I edit a text field in the table: The field editor
Jonathan Mitchell wrote:
MGSScriptExecutorManager *scriptExecutorManager;
NSString *tempFilePath;
}
@interface MGS_B : MGS_A {
@private
NSData *stderrData;
}
Change the ivars to something like this:
MGSScriptExecutorManager *scriptExecutorManager;
I have a IKImageBrowserView using disclosure-style groups. I'm setting
a dark background and have changed the item title attributes to use a
light color so the titles are visible. That all works great.
The problem is that I haven't been able to find a property key for
changing the group
Le 26 mai 2010 à 16:42, Graham Cox a écrit :
On 27/05/2010, at 12:35 AM, Keary Suska wrote:
Not enough info: are you using Core Data, or a simple modeled relationship?
I assume the issue is about traversing a relationship--otherwise the
solution is trivial...
No, it's a simple 'to
On May 26, 2010, at 6:10 AM, vincent habchi wrote:
So, tell me if I'm wrong, but I infer from your answer that whatever I can
do, there is no means for a subclass A' to access any private variable of its
ancestor.
Not without some nasty tricks (this is native code, so nasty tricks are
Hi Sean
I think you are confusing some similar-sounding words: override and
overwrite (and there's also overload). By overwrite, he means the
memory occupied by one ivar is being unexpectedly written to when
writing to a different ivar.
Yes, I gathered that as the discussion evolved.
Having done a *lot* with NSPredicateEditorRowTemplates and NSPredicateEditors
recently, I can confidently say that subclassing NSPredicateEditorRowTemplate
is almost always the easiest way to work with row templates.
Trying to configure them in Interface Builder is a pain in the proverbial
I think I'm on the verge of success with my attempt to create a selection
rectangle (that doesn't select text) for pdfview, but I'm unclear what init
routines I should use in my pdfview subclass. -
(id)initWithFrame:(NSRect)frameRect doesn't seem to get called--as it does in
nsview.
Matthew
On May 25, 2010, at 9:37 PM, Matthew Weinstein wrote:
Actually, I don't need the tiff; I just need the rectangle! People have to be
able to sketch the rectangle over the pdf, and then my program stores and
restores those rectangles (with some additional information).
PDFSelection has a
On May 26, 2010, at 11:38 AM, Matthew Weinstein wrote:
I think I'm on the verge of success with my attempt to create a selection
rectangle (that doesn't select text) for pdfview, but I'm unclear what init
routines I should use in my pdfview subclass. -
(id)initWithFrame:(NSRect)frameRect
Thanks, Thomas. I should've mentioned that I have to support 10.5, so
it looks like I'll have to figure out what to do for that case.
steve
On May 26, 2010, at 10:26 AM, Thomas Goossens wrote:
Hi Steve,
On SnowLeopard you can change the appearance of the group headers with
[imageBrowser
On May 26, 2010, at 4:40 AM, jonat...@mugginsoft.com wrote:
A subclass ivar is apparently overwriting a super class ivar.
When an instance of MGS_B sets stderrData the super class ivar
tempFilePath gets overwritten.
Moving tempFilePath up the ivar list resolves the problem (though
I have a UITabBar and a button in it. I am calling up a popover on the
button, but I want to make sure I only ever have one. And when the iPad is
rotated, remove the popover (I don't want it up anymore at that point). How
do I detect an event where the popover is dismissed by clicking outside the
Jens,
I think you’re confusing an inaccessible variable with an unused variable.
Those are very different concepts. For example, NSView’s _frame instance
variable is inaccessible from any subclass, but the variable is of course a
crucial part of the view’s state and is accessed by lots of
Sorry - I just needed to remove that check for nil and do this:
[self.popoverController dismissPopoverAnimated:NO];
self.popoverController = nil;
... then create
On Wed, May 26, 2010 at 3:03 PM, Eric E. Dolecki edole...@gmail.com wrote:
I have a UITabBar and a button in it. I am calling up a
On May 26, 2010, at 9:23 AM, Markus Spoettl wrote:
Hello,
I have a transparent NSTableView embedded in a scroll view that doesn't draw
its background which displays a bunch of NSTextFieldCell columns. Everything
is fine, the container view's background is visible through the table.
Aparently not. I did implement initWithCoder; it doesn't get called. Other
suggestions?
PS. I am using a nib.
On May 26, 2010, at 12:02 PM, cocoa-dev-requ...@lists.apple.com wrote:
ay 26, 2010, at 11:38 AM, Matthew Weinstein wrote:
I think I'm on the verge of success with my attempt to create
Dear programmers,
So, I used the crop marker code that apple provides to experiment in creating a
selecting rectangle. I first subclassed NsView as MWSelectingView, and
everything worked like clock work. I was even able to modify the CropMarker
object (MWViewSelectionMarker) so that when the
On May 26, 2010, at 3:18 PM, Corbin Dunn wrote:
I'm hoping I'm just being blind again and the there a solution for this
problem? Do I need to supply my own customized field editor via
-windowWillReturnFieldEditor:toObject:?
You'll probably have to do that.
Only it doesn't seem to work
On May 26, 2010, at 12:04 PM, vincent habchi wrote:
At the same time, I remember having this kind of weird behavior (I mean, one
variable unexpectedly written) when that variable has been (unexpectedly)
released, and its space is reused by some other variable.
That’s when an object on the
what is the correct way to send the computer to sleep? i couldn't find anything
in the documentation, except appleevents...
thanks, Julian.___
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments
If you need to make the computer sleep immediately, you can use the command
/usr/bin/pmset sleepnow.
Jeff Kelley
slaun...@umich.edu
On May 26, 2010, at 5:01 PM, Julian. wrote:
what is the correct way to send the computer to sleep? i couldn't find
anything in the documentation, except
Le 26 mai 2010 à 23:01, Julian. a écrit :
what is the correct way to send the computer to sleep? i couldn't find
anything in the documentation, except appleevents...
#include IOKit/pwr_mgt/IOPMLib.h
void SystemSleep() {
io_connect_t port = IOPMFindPowerManagement(MACH_PORT_NULL);
On May 26, 2010, at 1:13 PM, Matthew Weinstein wrote:
Now even before I can click on it, while it is loading from nib it bombs with
the following pearls of wisdom. I can't find a discussion of cpSelections
anywhere.
cpSelection objects are internal - used by PDFSelection beginning with
OK, this looks like the way forward. I'm new to the built-in UI for predicates
so I had assumed it had the model side of it covered, but it appears not.
That's a very useful bit of info to know!
--Graham
On 27/05/2010, at 3:03 AM, Frédéric Testuz wrote:
Le 26 mai 2010 à 16:42, Graham Cox a
Hi all,
Can someone tell me why the following code doesn't work?
- (void) showInfo {
FlipsideViewController *controller = [[FlipsideViewController alloc]
initWithNibName:@FlipsideView bundle:nil];
controller.delegate = self;
NSUInteger indexes[2] = {0,3};
Since nibs are loaded lazily, controller.unitTableView is probably nil when you
call selectRowAtIndexPath:.
Luke
On May 26, 2010, at 5:24 PM, Alejandro Marcos Aragón wrote:
Hi all,
Can someone tell me why the following code doesn't work?
- (void) showInfo {
Thanks, Matt and Paul, I will consider your suggestion to redesign my
windows level.
On Wed, May 26, 2010 at 5:47 AM, Matt Neuburg m...@tidbits.com wrote:
On Tue, 25 May 2010 17:34:37 +0800, XiaoGang Li andrew.mac...@gmail.com
said:
For my application, there is a button in the modal
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